- Professor of Law and Philosophy, University of Oxford, and Senior Research Fellow, All Souls College (from 2016 to 2019)
- Professor of Jurisprudence, University of Oxford (from 2000 to 2016)
- Reader in Legal Philosophy, King’s College London (from 1996 to 2000)
- Fellow and Tutor in Law, Brasenose College, Oxford (from 1991 to 1996)
- Prize Fellow, All Souls College, Oxford (from 1986 to 1991)
- The philosophy of private law, of criminal law, of public law, and of law in general, as well as nearby areas of moral philosophy, political philosophy, philosophical psychology, and the philosophy of action.
- Law as a Leap of Faith: Essays on Law in General (Oxford: Oxford University Press 2012)
- Offences and Defences: Selected Essays in the Philosophy of Criminal Law (Oxford: Oxford University Press 2007)
- Publications (External Link)